During a special segment of the episode, Heechul who is known to be a huge Sechskies fan battled against the group of guessing the correct Sechskies song. Heechul impressed everyone in the studio as well as the viewers this day with an amazing human-jukebox ability and eventually beating Sechskies in the game. Comedian Lee Soo Geun said, "This game is amazing in itself. How is Heechul playing a game with Sechskies where they guess which Sechskies song it is?"
After wrapping up the game, Heechul joined the group in covering their old track, "Reckless Love" as if he has always been part of the group.
Did you catch Sechskies on 'Knowing Brothers' this week?